2008-03-16 Tracking News

Contents on 16 March '08

IAU Minor Planet Center
- NEOCP Activity -- six listings: 2 new, 4 updated
- New MPECs -- one MPEC
Observers -- thirteen observing facilities
Impact Risk Monitoring -- six objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity on 16 March '08

The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and four updated listings. Of these, five were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 16 March '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 16 Mar. '08 >> MPEC 2008-F01 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08E69D 2008 ED69 (Q=4.708 AU, arc=4 days, H=16.7 ~1.55 km) from the Spacewatch 1.8m telescope (March 15.35-36p3)
K08E69C 2008 EC69 (Q=4.812 AU, arc=4 days, H=16.9 ~1.41 km) from Spacewatch 1.8m (March 15.37-38p3) and Greiner Research Obs. (GRO) (March 15.40-42p8)
K08E09A 2008 EA9 (small asteroid, arc=9 days, H=27.7 ~10m) from Spacewatch 1.8m (March 15.34-35p3)
K08E07R 2008 ER7 (arc=6 days, H=19.9 ~355m) from Spacewatch 1.8m (March 10.38-40p3 & 15.28-29p3)
K08E05X 2008 EX5 (small asteroid, arc=7 days, H=23.8 ~59m) from Spacewatch 1.8m (March 10.46-47p3)
K08A04F 2008 AF4 (arc=65 days, H=19.7 ~389m) from David Tholen's team on Mauna Kea (March 13.50p2)
Observations of recently (no longer) risk-listed objects
K08E08A 2008 EA8 (small asteroid, q=0.315 AU, arc=7 days, H=22.2 ~123m) from Spacewatch 1.8m (March 10.23p3 at V=22.2)
K08E07O 2008 EO7 (arc=9 days, H=19.5 ~426m) from program code "|" via La Silla (March 11.31-33p13) and Spacewatch 1.8m (March 15.33p3)
K08E06N 2008 EN6 (arc=6 days, H=19.2 ~490m) from Spacewatch 1.8m (March 10.24-25p3)
K08E05V 2008 EV5 (arc=8 days, H=19.9 ~355m) from Spacewatch 1.8m (March 10.14-16p3)
K08D05K 2008 DK5 (arc=16 days, H=21.4 ~178m) from the Mt. Lemmon Survey (MLS) (March 15.37-39p4)
K08D00Y 2008 DY (Q=4.380 AU, arc=18 days, H=20.7 ~245m) from LINEAR (March 15.38-43p5)
K08D00E 2008 DE (arc=32 days, H=19.4 ~446m) from LINEAR (March 15.35-38p3) and Desert Moon Obs. (March 15.41-43p3)
Observations of small asteroids (H>22.0)
K08E85J 2008 EJ85 (arc=2 days, H=25.2 ~31m) from LINEAR (March 15.22-26p5) and GRO (March 16.17-18p6)
K08E85E 2008 EE85 (arc=2 days, H=22.4 ~112m) from Astronomical Research Obs. (ARO) (March 15.19p3)
K08E84X 2008 EX84 (arc=3 days, H=22.3 ~117m) from ARO (March 15.17-18p3)
K08E09F 2008 EF9 (arc=33 days, H=22.5 ~107m) from Lumezzane Obs. (March 13.89p3)
K08E09E 2008 EE9 (arc=7 days, H=22.4 ~112m) from Lumezzane Obs. (March 13.99-00p4) and LINEAR (March 15.23-27p5)
K08E07Q 2008 EQ7 (arc=9 days, H=22.5 ~107m) from Desert Moon Obs. (March 15.35-39p3)
K08E00L 2008 EL (arc=31 days, H=22.3 ~117m) from LINEAR (March 9.33-38p5) and Lumezzane Obs. (March 13.84p4)
K08C22D 2008 CD22 (arc=35 days, H=22.1 ~129m) from LINEAR (March 15.27-32p9)
K08C00G 2008 CG (arc=43 days, H=22.1 ~129m) from ARO (March 15.08-11p2 at V=22.0-22.1)
K05EG9Y 2005 EY169 (arc=2 opp, H=22.2 ~123m) from Lumezzane Obs. (March 13.85-86p4)
Observations of other objects
K08E32B 2008 EB32 (arc=5 days, H=19.2 ~490m) from ARO (March 15.06-07p3)
K08E08M 2008 EM8 (q=1.762 AU, arc=9 days, H=18.2 ~776m) from ARO (March 15.18-19p3)
K08E06O 2008 EO6 (arc=10 days, H=19.7 ~389m) from Purple Mtn. Obs. XuYi Station (March 14.71-76p4)
K08D23H 2008 DH23 (arc=15 days, H=19.7 ~389m) from Spacewatch 1.8m (March 15.30p2)
K08D00W 2008 DW (arc=15 days, H=21.5 ~170m) from Spacewatch 1.8m (March 10.26-27p3 & 15.22-23p2) and MLS (March 15.37-39p4)
K08D00D 2008 DD (arc=21 days, H=20.4 ~282m) from Spacewatch 1.8m (March 10.49-50p3)
K08D00C 2008 DC (arc=26 days, H=20.0 ~339m) from ARO (March 15.07-08p3)
K08CB6J 2008 CJ116 (arc=34 days, H=19.1 ~513m) from ARO (March 15.12-14p3 at V=22.1)
K08C01L 2008 CL1 (arc=42 days, H=19.5 ~426m) from Hamamatsu-Yuto Obs. (March 11.57-59p5 & 15.48-50p3)
K08B22C 2008 BC22 (arc=63 days, H=19.8 ~371m) from Lumezzane Obs. (March 14.06-07p4)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from GRO (March 16.10-11p5)
K07T24U 2007 TU24 (arc=154 days, H=20.3 ~295m) from Purple Mtn. Obs. XuYi Station (March 13.50-54p4)
K07R09V 2007 RV9 (arc=2 opp, H=20.2 ~309m) from Lumezzane Obs. (March 14.03-04p4) and LINEAR (March 15.28-33p5)
K07P08A 2007 PA8 (Q=4.701 AU, arc=4 opp, H=16.0 ~2.14 km, q=0.958 AU) from GRO (March 16.05-07p6)
K05R34D 2005 RD34 (arc=2 opp, H=20.2 ~309m) from Lumezzane Obs. (March 13.90-91p3) and LINEAR (March 15.22-25p4)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (March 11.60-63p4 & 15.60-63p3)
K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from Lumezzane Obs. (March 13.91-92p4)
K03E50D 2003 ED50 (arc=3 opp, H=20.8 ~234m) from Spacewatch 1.8m (March 10.17-18p2)
K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Hamamatsu-Yuto Obs. (March 10.69-71p5) and LINEAR (March 15.17-21p5)
K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from MLS (March 15.21-23p4)
H5921 175921 2000 DM1 from LINEAR (March 15.17-21p5)
H2034 172034 2001 WR1 from LINEAR (March 15.44-47p3)
H0891 170891 2004 TY16 from LINEAR (March 15.11-15p5)
D8205 138205 2000 EZ148 from Lumezzane Obs. (March 13.93-94p4)
D7158 137158 1999 FB from Lumezzane Obs. (March 14.08p4)
D6618 136618 1994 CN2 from Lumezzane Obs. (March 14.04-05p4), Goodricke-Pigott Obs. (March 14.27-30p3), and LINEAR (March 15.27-32p5)
53789 53789 2000 ED104 from LINEAR (March 15.34-38p5)
09400 9400 1994 TW1 from LINEAR (March 15.33-38p5)
06037 6037 1988 EG from Lumezzane Obs. (March 13.84-85p4)
05836 5836 1993 MF from LINEAR (March 15.33-38p5)
01980 1980 Tezcatlipoca (1950 LA) from North Ryde Obs. (March 14.62-63p2)
01036 1036 Ganymed (1924 TD) from LINEAR (March 8.16-21p5)

Observers on 16 March '08

Thirteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-F01 -- 2008 EX84, 2008 EM8, 2008 EE85, 2008 EB32, 2008 DC, 2008 CJ116, 2008 CG
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2008-F01 -- 2008 EQ7, 2008 DE
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-F01 -- 136618
`H51`	Greiner Research Obs. (GRO) in Wisconsin, 4 in MPEC 2008-F01 -- 2008 EJ85, 2008 EC69, 2007 VQ4, 2007 PA8
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-F01 -- 2008 CL1, 2005 BE2, 2002 TD66
`704`	LINEAR in New Mexico, 17 in MPEC 2008-F01 -- 2008 EL, 2008 EJ85, 2008 EE9, 2008 DY, 2008 DE, 2008 CD22, 2007 RV9, 2005 RD34, 2002 TD66, 53789, 175921, 172034, 170891, 136618, 9400, 5836, 1036
`809\|`	program code "\|" via La Silla in Chile, 1 in MPEC 2008-F01 -- 2008 EO7
`130`	Lumezzane Obs. in Italy, 12 in MPEC 2008-F01 -- 2008 EL, 2008 EF9, 2008 EE9, 2008 BC22, 2007 RV9, 2005 RD34, 2005 EY169, 2004 CR2, 138205, 137158, 136618, 6037
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-F01 -- 2008 AF4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2008-F01 -- 2008 DW, 2008 DK5, 2002 CF26
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2008-F01 -- 1980
`D29`	Purple Mtn. Obs. XuYi Station in China, 2 in MPEC 2008-F01 -- 2008 EO6, 2007 TU24
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-F01 -- 2008 EX5, 2008 EV5, 2008 ER7, 2008 EO7, 2008 EN6, 2008 ED69, 2008 EC69, 2008 EA9, 2008 EA8, 2008 DW, 2008 DH23, 2008 DD, 2003 ED50

Impact Risk Monitoring on 16 March '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2008 ED69	NEODyS	1455	2064	1	1.19e-11	-6.53	-6.53	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/03/11.497 to 2008/03/15.364."

2008 EC69	NEODyS	1456	2015-2089	141	2.21e-07	-2.61	-3.63	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/03/11.497 to 2008/03/15.419."
2008 EC69	JPL Sentry	1455	2015-2107	147	2.6e-07	-2.56	-3.64	0	JPL: "Analysis based on 34 observations spanning 3.9224 days (2008-Mar-11.49608 to 2008-Mar-15.41845)." Diameter approximately 1.310 km. from mean, weighted H=17.1.

2008 EA9	NEODyS	1456	2041-2089	35	2.17e-05	-6.35	-6.82	0	NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2008/03/06.406 to 2008/03/15.346."
2008 EA9	JPL Sentry	1455	2063-2106	6	1.7e-05	-6.48	-6.83	0	JPL: "Analysis based on 27 observations spanning 8.9400 days (2008-Mar-06.40551 to 2008-Mar-15.34549)." Diameter approximately 0.010 km. from mean, weighted H=27.7.

2008 ER7	NEODyS	1456	2059-2090	14	7.55e-06	-2.69	-2.72	0	NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/03/06.337 to 2008/03/15.294."
2008 ER7	JPL Sentry	1455	2050-2105	54	1.4e-05	-2.46	-2.71	0	JPL: "Analysis based on 45 observations spanning 8.9567 days (2008-Mar-06.33608 to 2008-Mar-15.29275)." Diameter approximately 0.335 km. from mean, weighted H=20.0.

2008 EX5	NEODyS	1456	2049-2090	77	2.43e-05	-4.23	-4.78	0	NEODyS: "Based on 59 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/15.215."
2008 EX5	JPL Sentry	1455	2050-2101	41	2.4e-05	-4.24	-4.79	0	JPL: "Analysis based on 58 observations spanning 10.819 days (2008-Mar-04.39523 to 2008-Mar-15.21397)." Diameter approximately 0.057 km. from mean, weighted H=23.9.

2008 AF4	NEODyS	1719	2078-2089	2	4.33e-05	-2.02	-2.02	1	NEODyS: "Based on 588 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/15.122. NOTE: The Virtual Impactor in 2089/01/09.478 ... is rated as Torino Scale 1."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 16 March '08

Times are UTC for when items were noted or added by The Tracking News.

1719	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
1456	Noted that NEODyS has updated its 2008 EA9 risk assessment - see above Noted that NEODyS has updated its 2008 EC69 risk assessment - see above Noted that NEODyS has updated its 2008 ER7 risk assessment - see above Noted that NEODyS has updated its 2008 EX5 risk assessment - see above
1455	Noted that JPL Sentry has updated its 2008 EA9 risk assessment - see above Noted that JPL Sentry has updated its 2008 EC69 risk assessment - see above Noted that NEODyS has updated its 2008 ED69 risk assessment - see above Noted that JPL Sentry has updated its 2008 ER7 risk assessment - see above Noted that JPL Sentry has updated its 2008 EX5 risk assessment - see above Grabbed MPEC 2008-F01 - Daily Orbit Update - see above

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